Ok, a question on the new Level-D:On the overhead panel underneath the BAT switch, is a new "APU BAT DISCH" light (page 34 in the manual).1. Why does the APU have it's own battery?2. How is it charged? (by the APU itself when it's running?)3. When is the APU battery used, since to start the APU the main battery is used?I found no mention of the APU battery in the Boeing CBT :-hmmmThanks.

It's mainly a feature seen on "ER" versions (I think) . Most of the time, both batteries are paralleled, that means that the time the battery bus can be powered by the batteries only is increased from 30 min to 90 mins. While APU starts*, the paralleling is inhibited and the APU is powered by its own battery only.*APU Start = less than 42%N1 on ground, 50% at altitudes below 36,000', 55% at altitudes above 36,000'It's like this that it's simulated in Level-D Regards,

http://www.smartcockpit.com/b767/B767%20APU.PDFeverything you need to know on the 767 APU hehe.Gary HayesLevel-D Simulations Development TeamNo im not a "real" pilot, but I did stay at a Holiday Inn Express last night.P4 3.0ghz w/HT & FSB..GeForce FX 5900 ultra 256MB..1 gig PC3200 DDR RAM..Sound Blaster Audigy w/5.1 THX

>I found no mention of the APU battery in the Boeing CBT :-hmmmOptional extra, Maarten. It's part of the "Extended Standby Power" System. It was included just in case the operators of 767-300's with this system complained it was missing. Other than extending the life of the Standby Power system, 767 operators who don't have this system won't notice a great deal of difference in aircraft ops.Cheers.Ian.

Hi guys,Thanks for your replies, that cleared things up.Cheers.